After a migration from 1.5 to 2.5 I cant get k2 menu to work. Everything else work but when I select a k2 related menu type I get a console "joomla is not defined" and the result is at the attachments.

Hi. I don't see any attachments. Does this occur in front-end or backend?

I m sorry for the attachments but I cant upload them. the add file button works for jpg or png?

In the backend when I add the menu. If I select a K2 related type (categories , item etc) I get the messages i Described.

Which K2 version are you using? Ensure that you are using K2 2.6.8. Does this occur only in K2 menus? Can you create a menu link to an other extension?

I can create everything else but I cant create new or edit existing k2 menus. I used jupgrade for the migration.
Stopped working after 2.6.8
also everything in the db related to k2 lost Auto Increment , Primary Key and ids have a default zero rule.
I fixed the db manually but the problem with the menus still remain...

The database issues have probably to do with the upgrade process and as you understand there is nothing to be done in our part. Regarding the menu links i guess that the reason is the same. One thing you can try is to install K2 again ( don't uninstall first ). In any case remember to backup your site first. You can also ask for help at the jUpgrade guys since this seems more like a migration issue than a K2 issue.